The hydraulic system is the industry benchmark, featuring multi-functioning capabilities enabling operators to lift, swing, and rotate grapple simultaneously without impairing performance. The system also now has an improved cold oil bypass and hose routing increasing reliability.


The K660 boasts the fastest swing speed on the market. Combined with larger stabilizer cylinders, heavy duty structures, and pilot operated controls, it delivers peak performance and high productivity in all wood processing applications.


The K660 packs a punch with the 202 HP C7.1 Stage 5 Cat® engine and provides a simplified engine arrangement by reducing engine Electronic Control Modules (ECMs) from 3 to 1, using a direct drive fan and increased horsepower for peak performance and multi-functioning.


The steel console provides increased work zone visibility, an easy to clean surface and phone charging capabilities. Weiler electronics and control systems provide a user friendly interface and deliver new ease of use features including push to start.


95%+ of all fabrications for the loader, delimber and grapple are made in Weiler’s LaGrange, GA facility. This combined with a locally sourced trailer, U.S. manufactured cylinders, and a local parts warehouse enables quick reaction to customer needs.


The industry’s only loader and work tool package. The Weiler 426 delimber and 4548 or 5055 grapples ensure one point of contact for warranty and service to keep your operation up and running. Both grapple models can also be matched with a grapple saw direct from the factory.

Engine Model Cat® C7.1 Stage 5
Gross power 202 hp 151 kW
Engine Speed 1800 rpm
Weight 33,800 lb 15 331 kg
Fuel Capacity 100 gal 379 L
DEF Capacity 4.2 gal 16 L
Swing Torque 49,173 lbf-ft 66.7 kN·m
Swing Speed 11 rpm
Maximum Reach 32' 6" 9.90 m
Transport Width 8' 6" 2.57 m
Transport Height 13' 3" 4.04 m
Transport Length 52' 1" 15.88 m